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Old 12-07-2008, 11:11 AM
2005F250 2005F250 is offline
Compression Ignition Addict
 

Join Date: May 2007
Location: America
Posts: 6,528
HPOP = High Pressure Oil Pump. And the HPOP is what causes the injectors to fire and if the HPOP fails then the injectors won't work.
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